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Irish Cream Mousse Brownies

These Irish Cream Mousse Brownies have a layer of moist fudge brownies with Irish Cream and a layer of light mousse that contains more Irish Cream! They're so rich and delicious, yet very easy to make and assemble.
5 from 1 vote
Prep Time 30 minutes
Cook Time 25 minutes
Resting Time 20 minutes
Total Time 1 hour 15 minutes
Course Dessert
Cuisine American
Servings 16 brownies

Equipment

  • Mixing bowls
  • Hand or stand mixer
  • Measuring cups and spoons
  • silicone spatula
  • 8x8 baking pan
  • parchment paper or aluminum foil (optional)

Ingredients
  

For the brownies

  • ½ cup butter melted
  • 1 cup granulated sugar
  • 2 eggs
  • 1 teaspoon vanilla extract
  • ¼ cup Irish Cream
  • cup unsweetened cocoa powder
  • cup chocolate chips semi-sweet recommended, melted (2 ounces)
  • cup all-purpose flour
  • ¼ teaspoon salt

For the mousse and ganache layer

  • ¼ cup heavy cream
  • cup Irish Cream
  • 1 cup chocolate chips heaping cup

Instructions
 

To make the chocolate ganache

  • Pour the heavy cream and Irish Cream into a medium-sized microwave safe bowl and heat the cream for 30-45 seconds in the microwave, or until almost boiling. You can also heat until almost boiling on the stove using a small saucepan.
  • Remove the cream from heat and add the chocolate chips. Mix until the chocolate is melted and the mixture is smooth. Return to heat for a few seconds if needed to fully melt the chocolate.
  • Reserve ½ cup of the chocolate ganache mixture. Set it aside for topping the brownies later.
  • Place the remaining chocolate ganache in the fridge to begin cooling. While it cools, make the brownie batter.

To make the brownies

  • Preheat the oven to 350 degrees.
  • Line an 8×8 baking pan with parchment paper or aluminum foil. I recommend spraying the pan with cooking spray before lining it with parchment paper (this helps the parchment paper stick to the pan). Set the pan aside.
  • In a medium-large mixing bowl, add melted butter and granulated sugar. Whisk together (or use a hand mixer) until combined.
  • Add the eggs, vanilla extract, melted chocolate, Irish Cream and salt. Mix until combined.
  • Add the cocoa powder and mix (carefully) until well combined. This part can be messy!
  • Add the flour and mix until fully combined.
  • Pour the mixture into the lined 8×8 baking pan and use a silicone spatula to spread the batter evenly throughout the pan.
  • Bake for 20-25 minutes, or until a toothpick inserted in the center of the pan comes out clean (or with some crumbs).
  • Once fully baked, remove the brownies from the oven and allow them to cool to room temperature before adding the mousse layer. Put them in the fridge for faster cooling, if desired.

To make the chocolate mousse

  • While the brownies are baking, remove the chocolate ganache from the fridge. Take care not to let it get too cool to where the mixture sets. The chocolate should begin to feel cool to the touch – that means it's ready to whip into mousse!
  • Once the mixture is cool to the touch, remove it from the fridge and place it in a medium-large bowl or in a stand mixer bowl. I recommend using a stand mixer if you have it because the whipping process can take multiple minutes.
  • Whip the chocolate on medium-high speed using the whisk attachment. Mix until the mixture lightens and fluffs up. This will take 3-5 minutes.

To assemble the brownies

  • Once the brownies have fully cooled, gently spread the whipped chocolate ganache evenly over the brownies.
  • Pour the reserved non-whipped chocolate ganache over the top of the mousse and gently spread it to cover the entire pan of brownies. If the ganache has set, put it in the microwave for 5-8 seconds to make sure that it's spreadable.
  • Return the brownies to the fridge to allow the ganache to fully set (20-30 minutes), then enjoy! Keep these stored in the fridge.
Keyword brownies, chocolate mousse brownies, irish cream brownies, irish cream mousse brownies